Testing basic performance of a very small wind turbine designed for multi-purposes

Hirahara, Hidetoshi; Hossain, Md. Zakir; Kawahashi, Masaaki; Nonomura, Yoshitami

doi:10.1016/j.renene.2004.10.009

Cited by 102 publications

(55 citation statements)

References 7 publications

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“…The radius of blade is calculated based on the prediction of rated power, rated wind speed and total system efficiency: = √ 2 rated ρπ rated 3 η total (17) where Prated is the rated power, output from the blade, Vrated is the rated wind speed, usually assumed to be between 10 m/s and 12 m/s [5,6,11], ρ is the air density, and ηtotal is the total system efficiency, suggested to be 25% to 35% [11]. The system integration between the turbine blade and the generator is not considered in Equation (17).…”

Section: Geometry For Turbine Bladementioning

confidence: 99%

“…In the simulation model, Cp is assumed to be between the values of 0.38 and 0.45 in Equation (17). Previously, Hirahara et al [11] obtained experimentally the maximum power coefficient of 0.40 and 0.36 in the rated running conditions using the HAWT blade with a radius of 0.25 m. Hsiao et al [5] obtained a maximum power coefficient of the HAWT blade to be 0.428 at the tip speed ratio of 4.92 using the BEM theory and wind tunnel experiments. The power coefficient in this study was assumed to be 0.4 based on the studies mentioned above.…”

Section: Geometry For Turbine Bladementioning

confidence: 99%

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System Integration of the Horizontal-Axis Wind Turbine: The Design of Turbine Blades with an Axial-Flux Permanent Magnet Generator

et al. 2014

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Abstract:In designing a horizontal-axis wind turbine (HAWT) blade, system integration between the blade design and the performance test of the generator is important. This study shows the aerodynamic design of a HAWT blade operating with an axial-flux permanent magnet (AFPM) generator. An experimental platform was built to measure the performance curves of the AFPM generator for the purpose of designing the turbine blade. An in-house simulation code was developed based on the blade element momentum (BEM) theory and was used to lay out the geometric shape of the turbine blade, including the pitch angle and chord length at each section. This simulation code was combined with the two-dimensional (2D) airfoil data for predicting the aerodynamic performance of the designed blades. In addition, wind tunnel experiments were performed to verify the simulation results for the various operating conditions. By varying the rotational speeds at four wind speeds, the experimental and simulation results for the mechanical torques and OPEN ACCESSEnergies 2014, 7 7774 powers presented good agreement. The mechanical power of the system, which maximizes at the best operating region, provided significant information for designing the HAWT blade.

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Section: Geometry For Turbine Bladementioning

confidence: 99%

Section: Geometry For Turbine Bladementioning

confidence: 99%

System Integration of the Horizontal-Axis Wind Turbine: The Design of Turbine Blades with an Axial-Flux Permanent Magnet Generator

et al. 2014

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“…They lack the overall comprehensiveness addressing all the components together to develop a complete SSWT. Probably, the first attempt to make a complete SSWT was performed by Hirahara et al (2005). They developed a four-bladed 50 cm diameter small wind turbine called µF500 using NACA 2404 airfoil.…”

Section: Literature Reviewmentioning

confidence: 99%

Efficient Direct-Drive Small-Scale Low-Speed Wind Turbine

Kishore

Marin

Priya

2014

Energy Harvesting and Systems

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There is growing need for the green, reliable, and cost-effective power solution for the expanding wireless microelectronic devices. In many scenarios, these needs can be met through a small-scale wind energy portable turbine (SWEPT) that operates near ground level where wind speed is of the order of few meters per second. SWEPT is a three-bladed, 40 cm rotor diameter, direct-drive, horizontal-axis wind turbine that has very low cut-in wind speed of 1.7 m/s. It operates in a wide range of wind speeds between 1.7 m/s and 10 m/s and produces rated power output of 1 W at wind speed of 4.0 m/s. The wind turbine is capable of producing electrical power up to 9.8 W at wind speed of 10 m/s. The maximum efficiency of SWEPT was found to be around 21% which makes it one of the most efficient wind turbines reported at the small scale and low wind speed. These advancements open many new opportunities for embedding and utilizing wireless and portable devices.

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“…They lack the overall comprehensiveness addressing all the components together to develop a complete small scale wind turbine. Probably, the first attempt to make a complete SSWT was performed by Hirahara et al [34]. They developed a 4-bladed 50 cm diameter small wind turbine called reported with the flanged diffuser [42].…”

Section: Literature Reviewmentioning

confidence: 99%

“…For the LSWTs, the optimal tip speed ratio lies in the range of 8 to 10, whereas, for SSWTs, the value in the range of 2 to 4 has been suggested for the better reliability of performance and lower noise level [34]. The tip speed ratio was assumed to be λ =3.0, mean of 2 and 4 as a reliable initial guess.…”

Section: Airfoil Selectionmentioning

confidence: 99%

Small-scale wind energy portable turbine (SWEPT)

Kishore

Coudron

Priya

2013

Journal of Wind Engineering and Industrial Aerodynamics

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ABSTRACTguidance, support and encouragement. He has been a great mentor and I have learned a lot from him, both in academic research and in personal life. He didn't only provide me the necessary infrastructure and resources to complete this project, but also gave me enough freedom and opportunities to test and implement my own ideas. He always encouraged me to think 'out of box' and allowed me to work on several other projects apart from the subject of this thesis. Prof. Priya has his own style; his dedication towards the work, his courage and conviction to take new challenges, his optimism, and the most importantly, his attachment with the students are few of the many qualities that has always inspired me and will always motivate me in future to move ahead.I would also like to extend my heartfelt gratitude to Prof. Walter O'Brien and Prof.Danesh Tafti for mentoring me in many academic courses and serving on my MS committee.

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Testing basic performance of a very small wind turbine designed for multi-purposes

Cited by 102 publications

References 7 publications

System Integration of the Horizontal-Axis Wind Turbine: The Design of Turbine Blades with an Axial-Flux Permanent Magnet Generator

System Integration of the Horizontal-Axis Wind Turbine: The Design of Turbine Blades with an Axial-Flux Permanent Magnet Generator

Efficient Direct-Drive Small-Scale Low-Speed Wind Turbine

Small-scale wind energy portable turbine (SWEPT)

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